They have until Monday to join settlement that could pay out as much as $815 million

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NEW YORK — Thousands of laborers, police officers and firefighters suing New York City over their exposure to toxic World Trade Center dust have until Monday to decide whether to join a legal settlement that could ultimately pay them as much as $815 million.

More than 10,000 people have sued the city and a long list of companies that handled the massive cleanup of lower Manhattan after the 9/11 attacks.

Many claim to be suffering from illnesses caused by inhaling the pulverized remnants of the twin towers. Their lawsuits blame the government and its contractors for failing to provide proper equipment to protect their lungs.

Philip Seymour Hoffman withdrew a total of $1,200 from an ATM at a supermarket near his New York City apartment the night before he was found lifeless in his bathroom with a syringe still in his left arm, sources told NBC News.

Paul Napoli, a leader of the legal team representing most of the plaintiffs, told The Associated Press on Friday that with Monday's deadline looming on the largest and most important of several related settlements, 90 percent of those eligible had said "yes" to the deal.

An all-out effort was being made to get the rest to join on, he said. He said he and other lawyers in the firm were being besieged with questions from clients still trying to chose between taking the money, or rejecting it and taking their case to trial.

"A lot of people appear to be making a last minute decision," he said. "It's like tax day ... there is going to be a lot of last minute wrangling."

Under the terms of the deal, at least 95 percent of the plaintiffs must opt to participate for the settlement to become effective. Napoli said he was feeling good about hitting the target, although he added that getting the paperwork finished for each claim by midnight on the deadline will be no small feat.

"I'm hopeful there will be a little leeway," he said.

The Monday deadline technically applies only to a settlement negotiated between Napoli's legal team and the city's attorneys in the spring. That deal would distribute as much as $712 million among the workers, based on the severity of their illnesses and the likelihood they could be linked to the 9/11 attacks.

But since that deal was inked, the firm has worked out similar agreements with other defendants in the case, including the agency that owns the World Trade Center site, that will add to the total value of the pot.

An insurance company that represented the operators of barges that carried rubble from Manhattan to Staten Island after the attacks has agreed to settle for $28 million, Napoli said. Other entities, including those involved in the debris-sorting operation at the city's Fresh Kills landfill, have agreed in principle on settlements that will add another $100 million, he said.

Some rescue and recovery workers who had been outspoken critics of the deal early on have decided in the end to sign.

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Retired Fire Department Lt. Kenny Specht, who now leads a fraternal group for New York firefighters, was among them.

Like others, he said the payments responders will receive under the deal will never be enough to compensate for their illnesses. But he called the settlement, "the best we were going to do."

Fighting for more money in court, he said, seemed like it could wind up a losing battle, in part because "the shelf life" of sympathy for 9/11 responders is running out.

"I felt in my bones that it was expiring," he said.

He added that he was also concerned about the difficulty of trying to prove that common illnesses like cancer were caused by trade center dust. So far, scientists studying the issue has yet to find any such link.

"We are nine years outside of Sept. 11, and we live in a very technologically advanced time," he said. "If nine years after the fact, they have still not attributed the cancers that are killing us to 9/11, either they have that information, and there is no way they are going to publish it, or there just isn't a correlation."

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